bump softmixer to latest version (bug fixes)

bump softmixer to latest version (bug fixes)

This bring these commits:
b678f3 config.cmake: bump the needed version of alsalib to 1.1.6
a84a93 Remove an unfilled response json object
a07c4c removed the dependency to alsalib-1.1.6 for host
70fb34 Lower the verbosity when not in debug level
b34cd9 Migrate app-templates to CMake module
58d666 Merge pull request #2 from iotbzh/app-templates-migration
03aa71 config.cmake: fixed a typo
ca6383 alsa-core-pcm: fixed the mute logic
0e37ab Tweaking debug prints
92e038 Handle too small card PCM buffer when writing
a17d52 Fix the error string of attach actions
118377 remove dead code and renamed unobvious variables

Change-Id: Ie3e922f423ec9d6ba38c35263183d0e9143e5958
Signed-off-by: Thierry Bultel <thierry.bultel@iot.bzh>